3 * File name: ir/tr/typegmod.h
4 * Purpose: Functionality to modify the type graph.
5 * Author: Goetz Lindenmaier
9 * Copyright: (c) 2001-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
22 * This module supplies routines that support changing the type graph.
25 /** Replaces one type by the other.
27 * Old type is replaced by new_type. All references to old_type
28 * now point to new_type. The memory for the old type is destroyed,
29 * but still used. Therefore it is not freed.
30 * All referenced to this memory will be lost after a certain while.
31 * An exception is the list of types in irp (irprog.h).
32 * In the future there might be a routine to recover the memory, but
33 * this will be at considerable runtime cost.
35 * @param old_type - The old type that shall be replaced by the new type.
36 * @param new_type - The new type that will replace old_type.
39 void exchange_types(type *old_type, type *new_type);
41 /** Skip id types until a useful type is reached.
43 * @param tp - A type of arbitrary kind.
46 * tp if it is not an id type.
47 * If tp is an id type returns the real type it stands for.
49 type *skip_tid(type *tp);
51 # endif /*_TYPEGMOD_H_ */